Modified zeolite ZSM-5 for the methanol to aromatics reaction

Conte, Marco; López-Sánchez, José Antonio; He, Qian; Morgan, David; Ryabenkova, Yulia; Bartley, Jonathan K.; Carley, Albert Frederick; Taylor, Stuart Hamilton; Kiely, Christopher J.; Karim, Khalid; Hutchings, Graham J.

doi:10.1039/c1cy00299f

Cited by 185 publications

(145 citation statements)

References 45 publications

Supporting

Mentioning

136

Contrasting

Order By: Relevance

“…Conte et al have reported that in the methanol conversion, the selectivity to aromatic compounds was improved by loading metal species on ZSM-5 due to the interaction of acid sites of zeolite with basic sites of metal oxide [16]. The interaction of metal species with acid sites of zeolite involves changes in acid properties of the zeolite as well.…”

Section: Introductionmentioning

confidence: 99%

Selective Synthesis of Gasoline-Ranged Hydrocarbons from Syngas over Hybrid Catalyst Consisting of Metal-Loaded ZSM-5 Coupled with Copper-Zinc Oxide

Imai

Yamawaki

et al. 2014

Catalysts

View full text Add to dashboard Cite

Abstract:The conversion of syngas (CO + H 2 ) to gasoline-ranged hydrocarbons was carried out using a hybrid catalyst consisting of metal-loaded ZSM-5 coupled with Cu-ZnO in a near-critical n-hexane solvent. Methanol was synthesized from syngas over Cu-ZnO; subsequently, was converted to hydrocarbons through the formation of dimethyl ether (DME) over the metal-loaded ZSM-5. When 0.5 wt% Pd/ZSM-5 and 5 wt% Cu/ZSM-5 among the metal-loaded ZSM-5 catalysts with Pd, Co, Fe or Cu were employed as a portion of the hybrid catalyst, the gasoline-ranged hydrocarbons were selectively produced (the gasoline-ranged hydrocarbons in all hydrocarbons: 59% for the hybrid catalyst with Pd/ZSM-5 and 64% for that with Cu/ZSM-5) with a similar CO conversion during the reaction. An increase in the Cu loading on ZSM-5 resulted in increasing the yield of the gasoline-ranged hydrocarbons, and in decreasing the yield of DME. Furthermore, the hybrid catalyst with Cu/ZSM-5 exhibited no deactivation for 30 h of the reaction. It was revealed that a hybrid catalyst containing Cu/ZSM-5 was efficient in the selective synthesis of gasoline-ranged hydrocarbons from syngas via methanol in the near-critical n-hexane fluid.

show abstract

Section: Introductionmentioning

confidence: 99%

Selective Synthesis of Gasoline-Ranged Hydrocarbons from Syngas over Hybrid Catalyst Consisting of Metal-Loaded ZSM-5 Coupled with Copper-Zinc Oxide

Imai

Yamawaki

et al. 2014

Catalysts

View full text Add to dashboard Cite

show abstract

“…[20][21][22] Modification with Ag, Cu and Ni was found to enhance the selectivity of methanol to C6-C11 aromatic products. 23 It was reported that doping of HZSM-5 with Ni allows for an improvement of catalyst stability against coke formation in the transformation of bioethanol into olefins. 24 Incorporation of iron oxide nanoparticles (NPs) into zeolites was carried out for magnetic separation or magnetic stabilization, 25,26 to assist recrystallization of zeolites, 26 and for modification of catalytic properties.…”

Section: Introductionmentioning

confidence: 99%

Metal oxide–zeolite composites in transformation of methanol to hydrocarbons: do iron oxide and nickel oxide matter?

et al. 2016

View full text Add to dashboard Cite

(2016) Metal oxide-zeolite composites in transformation of methanol to hydrocarbons : do iron oxide and nickel oxide matter? RSC Advances, 6 (79). pp. 75166-75177. Permanent WRAP URL:http://wrap.warwick.ac.uk/81920 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work of researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. Publisher statement:First published by Royal Society of Chemistry 2016 http://dx.doi.org/10.1039/C6RA19471K A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP url' above for details on accessing the published version and note that access may require a subscription. ABSTRACT: The methanol-to-hydrocarbon (MTH) reaction received considerable attention as utilizing renewable sources of both value-added chemicals and fuels becomes number one priority for the society. Here, for the first time we report the development of hierarchical zeolites (ZSM-5) containing both iron oxide and nickel oxide nanoparticles. Modifying the iron oxide (magnetite, Fe3O4) amounts, we are able to control the catalyst activity and the product distribution in the MTH process. At the medium Fe3O4 loading, the major fraction is composed of the C9-C11 hydrocarbons (gasoline fraction). At the higher Fe3O4 loading, the C1-C4 hydrocarbons prevail in the reaction mixture, while at the lowest magnetite loading the major component is the C5-C8 hydrocarbons. Addition of Ni species to Fe3O4-ZSM-5 leads to the formation of mixed Ni oxides (NiO/Ni2O3) positioned either on top or next to Fe3O4 nanoparticles. This modification allowed us to significantly improve the catalyst stability due to diminishing coke formation and disordering of the coke formed. The incorporation of Ni oxide species also leads to a higher catalyst activity (up to 9.3 g(Methanol)/(g(ZSM-5)×h) and an improved selectivity (11.3% of the C5-C8 hydrocarbons and 23.6% of the C9-C11 hydrocarbons), making these zeolites highly promising for industrial applications.

show abstract

“…In addition to differences in ABs, the major difference between these catalysts is propylene selectivity; HZ produced more propylene (21%) than HZ-D (13%) and HZ-DA (14%) did. Propylene is a major precursor of ABs [45,46] and also a cracked product in arene and olefin cycles [36]; HZ-D is more active than HZ-DA in propylene aromatization to ABs because both catalysts possess great mesoporosities, but the former is enriched with non-framework Al. This difference is in accordance with the aforementioned hypothesis that non-framework Al species facilitate the hydride transfer and can promote aromatics yields.…”

Section: Resultsmentioning

confidence: 99%

“…Another point that should be addressed is the distributions of C 4 -C 7 hydrocarbons, which are generated together with ABs via the intermolecular hydrogen transfer of their precursors, i.e., olefins [45,46]. If the effect of side reactions is trivial, the selectivity of ABs should be positively correlated with that of C 4 -C 7 hydrocarbons.…”

Section: Resultsmentioning

confidence: 99%

The Role of Non-Framework Lewis Acidic Al Species of Alkali-Treated HZSM-5 in Methanol Aromatization

et al. 2017

View full text Add to dashboard Cite

Mesoporous HZSM-5 prepared by alkaline treatment (also termed desilication) has drawn significant attention due to its potential in large-scale production and in versatile applications, such as separation and catalysis. Alkali-treated HZSM-5 contains considerable amounts of non-framework (amorphous) Lewis acidic Al species on the external surface, and is deemed to be essential in affecting its catalytic performances. This study intends to clarify the catalytic nature of amorphous Al species of alkali-treated HZSM-5 in methanol aromatization. Physicochemical characterizations, including N 2 adsorption, scanning electron microscopy (SEM), X-ray diffraction (XRD), magic-angle-spinning nuclear magnetic resonance (MAS NMR), inductively coupled plasma (ICP) analysis, NH 3 temperature-programmed desorption (TPD), and methanol-TPD, were performed. The outcomes showed that non-framework Al promotes the hydride transfer in mesoporous HZSM-5, thereby facilitating the aromatization reaction. Among aromatic products, durene can be promoted by non-framework Al through methylation/transalkylation of other aromatics, particularly xylenes, instead of being promoted by reduced space confinement in mesoporous HZSM-5.

show abstract

Modified zeolite ZSM-5 for the methanol to aromatics reaction

Cited by 185 publications

References 45 publications

Selective Synthesis of Gasoline-Ranged Hydrocarbons from Syngas over Hybrid Catalyst Consisting of Metal-Loaded ZSM-5 Coupled with Copper-Zinc Oxide

Selective Synthesis of Gasoline-Ranged Hydrocarbons from Syngas over Hybrid Catalyst Consisting of Metal-Loaded ZSM-5 Coupled with Copper-Zinc Oxide

Metal oxide–zeolite composites in transformation of methanol to hydrocarbons: do iron oxide and nickel oxide matter?

The Role of Non-Framework Lewis Acidic Al Species of Alkali-Treated HZSM-5 in Methanol Aromatization

Contact Info

Product

Resources

About